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@eiteh gisten @sterft @finish4 SETE` GREEN, ,or ROCHESTER, NEW YORK; A Letters Patent No. 68,871, dated September 17,1867. l

DEVICE FOR HATOHING THE SPAWN'OF FISHES.

TQ ALL WHOM IT MAY CONGERN: V

'Be it known that lI, SETH GREEN, of Rochester, in the county lofi-Monroe, and State 'of New 'York,`havc invented a new and useful Method of Hatching Fish-Spawn; and Ido hereby declare that the following is a 'ful,l',iclea'r, and exact description thereof, reference being had to the accompanying drawing, making pmtof this specication, in which the `{ig-ure is a vertical central section of inyinvention, represented as applicdpin the water. l i v l This inventionvrelates lnore especially tothe propagation of `shad, andiitsfnature'consists in the'ipeculiar s construction and Iarrangement of n propagating or fish antrag-spawn hatching-chamber in such a manner -as to effect a perfect and uniform circula-tion throughout the entire chambegand at the same time prevent the escape of the spawn, anclalso of the young sh, until the attendantthinks proper.4 x

To enable others to make and use my invention, I will descbeitsconstruction and operation,

I. provide e, rectangular bo'x,A, of any desired size c'r proportion. I prefer them, however, about two feet long by eighteen inches'wide and ten or twelve inches deep. I provide a suitable square opening in one end, y

as shown at'B. This opening is covered upon the inside of the chamber with afina wire screen, ahouthlo'.` 12,'

Vand upon the l'outside is hung` acap, C, which may be pivoted above, as shown, and made. to swing down over the opening, or it may be made to slide over it horizontally. I also provide the open bottom with a. similar wire screen, D',Vbut of linerV mesh. I attach a shallow frame, F, .to the lower edge of the chamberor case A, outside of the screen. There may be one or more cross-bars, E, but they should bemade thin on the upper side, :is p shown, to prevent the lodgment of any of thespawn upon them, as the spawn will only hatch well when buoycdup in the water, a rperfect circulation.' I sttach'a- Bont:bar,. G, obliquely across each side ofthe cascor" chamber'A, and to one endof these, I attach a suitable anchoring-co1d, c. They arr-:connected together a few feet from the bars, and continued Ain one cord'to the anchor lc. The chambers may be`cut down,asshown, or` they'may be' left full, as indicated hy the dotted lines d. The floats Fmay be v.er y much lengthened, if desired,

and a. series' of cases attached to them, or there may be a long case made and providedwith suitable divisions p and anchored across the stream, from each end, butI prefer to have the cases made separate, and in sizcaud,

proportion about as rstdcscribed.' v".llheyshould be arranged more or less obliquely upon' the ilon'tsF, accordl ing to the rapidity with which the current runs in which they are to bc anchored.` Y The obliquity shown in the drawing I find well adapted to a current running about two miles per hour, for shud, which aiords a perfect i circulation, just 4sufficient to keep the shadlspawn perfectly buoyed in the water, and all exposed to u gentle p agitation. In a faster stream or current the case shouldbe arranged flatter upon the iloats, and vice versa.

The spawn to be hatched inA this apparatus is prepared in the usual manner for artificial hatching. The cases should be carefully watched. They .shohld be anchored in a'current, for shud, but may 'be anchored still water for certain other varieties of fish, and for frogs. As soon as the spawn is hatched the plate rsisedend the youngshad pass out through the screen The case must only be opened after dark, for slung-jV ed during'the day. This gives the young shadan as'thesmaller fish which would take the young' shad only fe opportunity to'take care of themselves as nature dictates.

The ends or sides, either or both, may be made of wire or cloth screens, with a. bottom of the saine, or it v may be made close, but I prefer thc construction principally shown and described. It will be seen that by this Y l i i plan the spawn is all exposed to the circulation necessary, and is entirely relieved from all scdimcntor other obstructions or tendencies to preventa .perfect hatching. y What I claim as my iuventionfanddesito secure by Letters Patent, is-'` v The employment or use of the ffishipr'opngator or spawn-hatcher, copstructed and arranged substantially in the. maintien and for the purposes herein shown and described. i SETH' GREEN.

Witnesses:

vWM. S. Louonsonouou, FRED; A. HArcn. 

